Coil winding machines



Jan. 14, 1958 J. D. MATHIS COIL WINDING MACHINES s Sheets-Sheet 1 mllllllhlllllllll Filed Oct. 15, 1956 i-lllllllllllllllll i NAA 0Q Kill] INVENTORl Julian fl. Mai/ills,

BY PM Hawl ATTORNEYS Jan. 14-, 1958 MATHls 2,819,850

COIL WINDING MACHINES Filed Oct. 15, 1956 3 Sheets-Sheet 2 A TTORNEYS Jan. 14, 1958 J. D. MATHIS COIL WINDING MACHINESY 3 SheetsSheet 3 Filed Oct. 15, 1956 or INVENTOR. a JazlmnflMfizw my PM H w ATTORNEYS United Sta es.

2,819,850 con. WINDING MACHINES Julian D. Mathis, Bristol, Pa. Application October is, 1956, Serial N0. 616,044

6 Claims. c1. z42- 4 This invention relates to coil winding machines. More specifically, it is concerned with machines useful in winding so called toroidal coils in which the wire is ring wound about open or annular cores.

The chief aim of my invention is to provide a machine for winding coils of the type particularly referred to, which is simple in construction and reliable in operation, by which the cores of the coil can be wound in a minimum of time and which requires but a small amount of power to drive it.

Other objects and attendant advantages will appear from the following detail description of the attached drawings, wherein:

Fig. 1 is a view in front elevation of a winding machine conveniently embodying my invention.

Fig. 2 shows the machine in end elevation or as seen when viewed from the right of Fig. 1.

Figs. 3 and 4 are views corresponding to Fig. 1 with the moving parts in different positions during the formation of a single turn about the annular core of the toroidal coil.

Figs. 5, 6, 7, 8 and 9 are diagrammatic views showing successive stages in the movement of the bobbin, from which the wire for the winding is supplied, relative to the annular core of the toroidal coil.

As herein exemplified, the coil winding machine of my invention comprises a base 1 which provides spaced upstanding bearings 2 for a shaft 3 having a drive pulley or sheave 4 secured to one end thereof, and a crank arm 5 secured to the other end thereof. The machine may be driven by power from an electric motor or other prime mover through a speed-reducing belt connection (not shown) with the pulley 4. Fulcrurned on the shaft 3 intermediate the bearings 2 and between two fixed collars 3a is an open frame 6 which, by means of a link 7, is connected to the upper end of a rocker arm 8 pivoted at an intermediate point to a post 9 on the base 1 with its lower end coupled, in turn, with the crank arm 5 by means of a link 10. As a consequence of this arrangement, the frame 6 is constantly oscillated from side to side as the shaft 3 is rotated during operation of the machine. Secured to the top cross bar 6a of the frame 6 at the center is a screw clamp 11 for supporting, in suspension, the annular core R which is to be wound with wire. Constrained to up and down movement between pairs of grooved guide rollers 12 and 13 on the frame 6, is a slide 15 having a stud 16 projecting outwardly therefrom adjacent the bottom. A roller 17 free on the stud 15 bears upon the edge of a segmental rotary cam 18 fast on the shaft 3 forwardly of the frame 6, the roller 17 being maintained in operative engagement with said cam by means of a spring designated 19. At the top, the slide 15 is provided with lateral arms 20 and 21 of which the ends are upturned; and extending inwardly from these upturned ends, in coaxial relation, are pins 22 and 23 between which a wire carrying bobbin B is shuttled back and forth during oscillation of the frame 6 in a manner presently explained, the distal ends of said pins being spaced by a substantial gap to clear the annular 2,819,850 feaste .Jen- 14, 5

core R. To prepare the machine for a winding operation, the core R for the coil is secured in the clamp 11, a wire carrying bobbin B is impaled upon the pin 23 andthe end of the wire lodged in an anchorage 25 on the frame 6, all as shown in Fig. 1.

Operation As the shaft 3 is rotated, the frame 6 is swung alternately from the full line position in Fig. 1 to the position of Fig. 3 and then reversely or back through the full line position of Fig. 4 to the broken line position in Fig. 4, and then reversely or back to the full line position in Fig. 1. As the frame 6 swings to the left, the bobbin B is thrown from the pin 23, through the opening of the core ring R, to the pin 22. Upon initiation of the rightward swing of the frame 6, the slide 15 is permitted to recede, i. e., is drawn toward the shaft 3 as a consequence of the changed position of the cam 18, so that during the completion of the rightward swing of the frame through the full line position in Fig. 4, the bobbin B is thrown back from the pin 22 to the pin 23 passing this time however, beneath the core ring R. Then as the frame begins its next leftward swing, the cam 18 will be positioned as indicated in broken lines in Fig. 4 and cause the slide to be re-elevated so that, as said frame continues in this swing, the bobbin B will again be passed through the opening in the annular core R in being thrown from the pin 23 to the pin 22. Thus by repeated oscillations of the frame 6, several turns of the wire will be wound about the core R, in a manner readily understood from diagrammatic Figs. 5-9 which show the successive positions of the bobbin B relative to the core R incident to the formation of a single turn of the wire. When the desired number of turns are thus wound, the machine is stopped and the core R is turned to a new position in the clamp 11 and the machine re-started for repetition of the performance above described. Accordingly, it will be seen that, in this way, the core R can be wound with the wire throughout its circumferential extent in a minimum of time. The machine of my invention is thus simple in construction and operable without requiring the exercise of any special skill on the part of the user.

Having thus described my invention, 1 claim:

1. In a toroidal coil winding machine, a tubular wirecarrying bobbin, 9. support for a core ring to be wound; a member supporting a pair of axially-aligned guide pins of which the distal ends are spaced to clear the core ring; means operative to cause the tubular wire carrying bobbin to shuttle back and forth between the pins; and means for relatively positioning the core ring support and pin supporting member so that the bobbin is caused to pass through the core ring when thrown in one direction, and to pass outside the core ring when thrown in the opposite direction.

2. In a toroidal coil winding machine, a drive shaft; a support in the form of an open frame fulcrumed for oscillation on said shaft; means through which the frame is oscillated through connections with the shaft; a clamp by which a core ring to be wound with wire is supported in suspension from the top of the frame within the opening of the latter; a tubular wire-carrying bobbin; a slide constrained to up and down movement on the frame, said slide having lateral arms with axially aligned inward pin projections'respectively of which the distal ends are separated by a gap to clear the core ring; and means for actuating the slide to position it for shuttling of the wire-carrying bobbin from one of the pins to the other through the opening in the core ring during the swing of the frame in one direction, and, during the swing of the frame in the opposite direction, to position the slide for reverse shuttling of the bobbin in a path outside of the core ring from said other pin back to the first mentioned pin.

3. A winding machine according to claim 2, wherein the means for oscillating the frame includes a crank affixed to the shaft, an arm f'ulc'rniiied inteime diate its ends on a fixed pivot, and links connecting opposite ends of said arms respectively with said frame and with said crank. l

4. A winding machine according to claim 2, wherein the means for actuating the slide includes a rotary cam fast on the shaft, and a projection on the slide in engagement with said cam.

5. A Winding machine according to claim 2, wherein the means for actuating the slide includes a rotary edge cam fast on the shaft, a roller on 4 v I the slide to bear upon the edge of the cam, and spring means for maintaining the roller in engagement with said earn.

6. A winding machine according to claim 3, further including a base, bearings on the base for the shaft, a post on the base and a fulcrum pivot on the post for the lever.

References Cited in the file of this patent UNITED STATES PATENTS 

